Abstract
Enriched peribacteroid membranes were prepared from Phaseolus vulgaris nodules and, in the presence of metleghemoglobin and H(2)O(2), membranal lipid peroxidation was observed. The initial rate of the reaction was low and increased with time. Ferrous leghemoglobin was unable to induce this peroxidation with H(2)O(2). Thus, it appears that leghemoglobin (IV) is not the activated species involved in this process. Heme plays a role in this peroxidation and the hydroxyl radical is not an intermediate of the reaction. Lipid peroxidation in peribacteroid membranes was also observed in the presence of iron ions. A mixture of iron (III) and iron (II) produced a maximal peroxidation. Senescing nodule extracts were able to provoke membranal lipid peroxidation; they contained nonprotein-bound iron. Peribacteroid membranes were more sensitive than microsomes to peroxidation, as measured by malonaldehyde formation.
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Claims 9
Claim · model-written summary
Metleghemoglobin with H2O2 causes lipid peroxidation in peribacteroid membranes.
- Taxon
- Phaseolus vulgaris
Phaseolus vulgarise0 - Treatment
- metleghemoglobin and H(2)O(2)e1
- Outcome
- membranal lipid peroxidatione1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enriched peribacteroid membranes were prepared from Phaseolus vulgaris nodules”
e1“in the presence of metleghemoglobin and H(2)O(2), membranal lipid peroxidation was observed”
Claim · model-written summary
The initial rate of lipid peroxidation in peribacteroid membranes increased with time.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Outcome
- initial rate of the reactione1
- Direction
- increasede1
- Qualifier
- with timee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enriched peribacteroid membranes were prepared from Phaseolus vulgaris nodules”
e1“The initial rate of the reaction was low and increased with time”
Claim · model-written summary
Ferrous leghemoglobin with H2O2 does not induce peribacteroid membrane peroxidation, unlike metleghemoglobin.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Treatment
- Ferrous leghemoglobine1
- Outcome
- peroxidatione1
- Comparator
- metleghemoglobin and H(2)O(2)e2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enriched peribacteroid membranes were prepared from Phaseolus vulgaris nodules”
e1“Ferrous leghemoglobin was unable to induce this peroxidation with H(2)O(2)”
e2“in the presence of metleghemoglobin and H(2)O(2), membranal lipid peroxidation was observed”
Claim · model-written summary
Heme plays a role in peribacteroid membrane peroxidation.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Compound
- Hemee1
- Outcome
- peroxidatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enriched peribacteroid membranes were prepared from Phaseolus vulgaris nodules”
e1“Heme plays a role in this peroxidation and the hydroxyl radical is not an intermediate of the reaction”
Claim · model-written summary
The hydroxyl radical is not an intermediate of the peroxidation reaction in peribacteroid membranes.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Compound
- hydroxyl radicale1
- Outcome
- intermediate of the reactione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enriched peribacteroid membranes were prepared from Phaseolus vulgaris nodules”
e1“Heme plays a role in this peroxidation and the hydroxyl radical is not an intermediate of the reaction”
Claim · model-written summary
Iron ions induce lipid peroxidation in peribacteroid membranes.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Treatment
- iron ionse1
- Outcome
- Lipid peroxidatione1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enriched peribacteroid membranes were prepared from Phaseolus vulgaris nodules”
e1“Lipid peroxidation in peribacteroid membranes was also observed in the presence of iron ions”
Claim · model-written summary
A mixture of iron(III) and iron(II) produces maximal peroxidation in peribacteroid membranes.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Treatment
- mixture of iron (III) and iron (II)e1
- Outcome
- peroxidatione1
- Direction
- maximale1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enriched peribacteroid membranes were prepared from Phaseolus vulgaris nodules”
e1“A mixture of iron (III) and iron (II) produced a maximal peroxidation”
Claim · model-written summary
Senescing nodule extracts provoke lipid peroxidation of peribacteroid membranes.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Treatment
- Senescing nodule extractse1
- Outcome
- membranal lipid peroxidatione1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enriched peribacteroid membranes were prepared from Phaseolus vulgaris nodules”
e1“Senescing nodule extracts were able to provoke membranal lipid peroxidation”
Claim · model-written summary
Peribacteroid membranes are more sensitive to peroxidation than microsomes.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Outcome
- peroxidatione1
- Direction
- more sensitivee1
- Comparator
- microsomese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enriched peribacteroid membranes were prepared from Phaseolus vulgaris nodules”
e1“Peribacteroid membranes were more sensitive than microsomes to peroxidation”
The same questions in other papers
iron atom · physiology: oxidative · Phaseolus vulgaris (common bean)Positive and negative results
2 in the opposite direction
- positive
- positive
botanical · physiology: oxidative · Phaseolus vulgaris (common bean)Positive and negative results
4 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.